Phonograph



G. M RENTZ.

'PHONOGRAPH] APPLICATION FILED APR.8,1920.

Patented Apr. 26, 1921.

'INVENTOR. GEORGE M. em-z Y 6. a" ATTORNEY" UNITED STATES GEORGE M. RENTZ, OF WELLS, MINNESOTA.

PHONOGRAPH.

Specification of Letters Patent.

Patented Apr. 26, 1921.

Application filed April 8, 1920. Serial No. 972,379.

To all whom it may concern:

Be it known that I, GEORGE M. Rnn'rz, a citizen of the United States, residing at Wells, in the county of Faribault and State of Minnesota, have invented certain new and useful Improvements in Phonographs, of which the following is a specification.

This invention pertains to phonographs and the object is to provide an improved type and construction of sound amplifying horn, and to provide resonators which by reason of their construction and position relative to the horn, will blend, refine and modulate the vibratory movements from the stylus so as to bring out the accents and tonal qualities of the music in a'most natural, beautiful and pleasing manner.

The invention is clearly illustrated in the accompanying drawing, in which;

Figure 1 is a front view of a phonographelnbodying my invention.

Fig. 2 is a sectional view on the line 2'2 in Fig. 1. Fig. 3 is a horizontal section of the cabinet below the motor board showing a top view of the improved horn, with portions broken away.

Fig. 4 is an enlarged sectional detail view on the line 4-4 in Fig. 2.

Corresponding parts in the various figures of the drawing are indicated and referred to in the following description by the same reference characters.

The cabinet 5, herewith illustrated, as well as the motor board 6, the tone arm 7 and the sound reproducing elements are of any common and well known construction. The portion of the instrument which I hereinafter claim as my invention includes, the form construction and'method of supporting the double horn 8. Said horn 8 is open at its front end and has at its rear end a vertical hollow standard 9 through which the sound is carried from the tone arm 7 such sound being evenly split by a wedge 10 before passing into the two tone chambers of the horn 8.

Within the front end portion of the horn and secured to the inner wall thereof is a opposite ends out into the outlets of the two tone chambers. The resonators form at their end portions into inclined blades, such inclination being toward the front end of the horn, as shown in Fig.- 2, wherein the two lower resonators are not in section but are intact.

The horn itself is pivotally suspended at its front end on two suitable pivots 12 and rests with its rear end upon a leaf spring 13, thus leaving its walls free to vibrate independent of the cabinet. The spring 13 is of sufficient elasticity to hold the top end of the standard 9 snugly against the motorboard 6 when the same is in proper position on the cabinet.

Having now therefore full shown and described my invention, what claim to be new and desire to protect by Letters Patent is:

1. In a sound reproducing machine and cabinet therefor, a sound amplifying horn suspended within said cabinet, means for pivotally supporting the front end of said horn, and resilient means for supporting the rear end of said horn.

2. In combination with a phonograph having a suitable cabinet and a motor board thereon adapted to support a sound reproducing device, a sound amplifying horn positioned within said cabinet and pivotally suspended at its front end thereto, a hollow vertical standard integral with said horn and adapted to receive and transmit sound waves from said sound reproducing device thereto, resilient means for supporting the I rear end of the horn.

3. In combination with a phonograph having a suitable cabinet and a motorboard thereon adapted to support a sound reproducing device, a sound amplifying horn positioned within said cabinet and pivotally suspended at its front end thereto, a hollow vertical standard integral with said horn and adapted to receive and transmit sound waves from said sound reproducing device thereto, resilient means for pressing said vertical. standard upward against said motor board.

In testimony whereof I aflix my signature.

' GEORGE RENTZ. 

